/ic/ - Artwork/Critique

Hey, I'm going through Michael Hampton's Analytical Figure Drawing course. I'm currently halfway through the homework for week 7 (upper arm and shoulder), but I'm having a hard time to understand precisely what the exercise is supposed to be and if I'm doing it right.

In the video he says to just draw the biceps and the brachialis, but the syllabus says: "25 Shoulder and arms constructions. Develop the anatomy of the upper arms together with the anatomy of the upper torso. This week should specifically focus on the shoulder girdle and the muscles of the scapula and front of the humerus."

Can I have some feedback on some of the exercises I've done to this point, so I can correct the route for the rest of the assignment?